$ git clone -n https://github.com/xcp-ng-rpms/opam.git /var/lib/mock/v8.3-incoming-5408-8244/root/chroot_tmpdir/scmroot/opam
Cloning into '/var/lib/mock/v8.3-incoming-5408-8244/root/chroot_tmpdir/scmroot/opam'...
$ git reset --hard 81101c029fcbe7770d46b5500882e7457f3704bd
Downloading SOURCES/opam-full-2.1.4.tar.gz (11 MB)
HEAD is now at 81101c0 Merge branch 'XS-8.3'